<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .opera{
            position: relative;
            width: 258px;
            height: 275px;
            background: #f22629;
            border-radius:258px 258px 258px 258px/275px 275px 275px 275px ;
        }
        .op-opera{
            position: absolute;
            background: #ffffff;
            width: 112px;
            height: 231px;
            border-radius: 112px 112px 112px 112px/231px 231px 231px 231px;
            top:50%;
            left: 50%;
            bottom: 50%;
            right: 50%;
            margin-left:-56px;
            margin-top: -115px;
        }
    </style>
</head>
<body>
  <div class="opera">
      <div class="op-opera"></div>
  </div>
  <script>

      var ctx = parseInt(1111,1);
      console.log(ctx);
  </script>
</body>
</html>